PEAK PERFORMANCE: to maintain your best shave, we recommend replacing the shaver head every 18 monthsEFFICIENT SHAVING: featuring 5 shaving elements to cut through millions of hairs with easePERFECT SHAVE IN ONE STROKE: with this shaver head’s 5 perfectly synchronized shaving elementsSIMPLE REPLACEMENT: easily attach your new shaver head - just by clicking it onQUALITY CRAFTSMANSHIP: 100% made in Germany and compatible with Series 9 electric shavers